Commutator or timer



May 27, 1924. 1,495,846

O.+ HHNZMANN COMMUTATOR-OR TIMER Filed Oct. 9. 1920 Patented May 27, 1924.

umreo sures sorre Hal-K2 4 4 11 .501 ma -E BAY, new YORK.

.C MM A B A -mam jnled October a, 1920, .Serial No. 415,717.

To all whom it may concern:

Be itknown that I,;O'rro J. HEINZMANN, citizen of United States, residing at Prince Bay, S. 1., in the county of Richmond and State of New York, have invented new and useful Improvements 'in .Commutators or Timers. of which the following isa "speci This invention relates 'tofco nmiitators "or timers, andt-he principal object is to pro fp'artsthan' duce a commutator of fewer those now on the market.

Another object 'is to produce afdevice of this nature which shall be "simple ofconstruction, "cheap to manufacture, and efficient for the ,purpose for WlliCliit is'designed.

Another object is to produce a device of this nature which may be easily assembled and readily taken apart to replace broken and worn parts.

With these and incidental objects in view, the invention resides in certain novel construction and combination and arrangement of parts the essential features'of which are set forth in the following description and claims and fully shown in the accompanying drawing, in which Figure 1 is a view of a standard timer provided with my improvement.

Figure 2 is a perspective view of the roller retaining spring.

Figure 3 is a view of the pivot pin of the roller.

Figure 4 is a plan view of the roller holding arm per se.

Figure 5 is an elevational view of the roller holding arm per se,

Like characters of reference refer to like parts in all views.

In the commutator used by the ,Ford car as at present constructed there are seven moving parts, and the present invention contemplates the simplifying of the structure so that four parts only are used, and these are assembled without any rivets or similar parts.

Referring more particularly to the drawing, 1 represents the usual casing of a Ford commutator provided with the contacts 2 seated in the fibre or other insulating mem her 3 and connected with respective binding posts and thumb nuts 4. The usual pull connection is shown at 5. All of these parts are old and no claim is made to them except in combination with the new mechanism' hereinafter described.

Mounted on the usual rotary shaft 6 is the boss "7 of a roller arrn8. The arm 8 is slotted in at "9 and 10 so as to form a pair offingers 11; and is formed with a pair of hooked fingers 12 between the hooks of which isjde fine'd 'a spring seat 13. ,A notch 14 'isjfQrmed"infarm 8 adjacent to the n ers A rolle r 15is'm'ounte'd to'turn freely upon a pin .16 whichpin is slabbedofit' at its ends "so astojform flat faces 17 which are adapted 'tObearZagainst thesides of the slot 9 when the pin 16 is inserted in said slot as shown infFigure' 11 The slot 10"in which'the'roller 15 is'inserte'd 'isexten'ded into the body of the boss?" and arm 8' as shown in dotted lines 'infFig'ure tso as to permit of insertion ofsai'droller and of the free movement of said roller when in place. The purpose of this roller is the same as of the roller in the commutator now in use, viz, to contact members 2 and complete the primary cir-.

cuits as will be understood by those skilled in the art.

A spring member 18 is formed with an offset 19 having its end slotted to straddle roller 15 and bent into beads 20. This ofiset 19 is inserted in slot 9 with beads 20 resting against the ends of pin 16. The other end of the spring 18 is bent upon itself at 21 and formed into arcuate catches 22 and 23 provided with a terminal finger piece 24. The portion 21 is forced through the aperture 13 so that the portion 22 catches in rear of the fingers 12 and portion 23 fits into notch 14 of arm 8.

A pin passes through a notch in boss 7 to hold the boss and connected parts on the shaft or post 6.

The operation is the same as that of the parts in the ordinary commutator which have been replaced by the above described mechanism, and is thought to be so obvious as not to require further description. In removing the parts, the finger piece 24: is operated to disengage portion 23 from notch 14, then the portion 21 is removed from the spring seat 13 and the spring, pin and roller may then be removed.

While I have described what I deem to be the most desirable embodiment of my invention, it is obvious that many of the details may be varied without in any way depin on which said roller is mounted and parting from the spirit of my invention, and I therefore do not limit myself to the exact details of construction herein set forth nor to anything less than the whole of my invention limited only by the appended providedwith flat faces at its end portions adapted to coact with the fingers ofv one of said pairs so as to be held in seated position v and against turning, and a spring member adapted to be seated between the fingers of the other of said pairs of fingers and to press said pin. into engagement with the first pair of fingers.

2. In a device of the. class described, the

combination'of an arm adapted to besecured to-arotary shaft and provided with .apin seat and with a spring seat, a contact roller, a pin forsaid roller adapted to be seated in said pin seat, a spring adapted to be seated in. said spring seat and t0 co-acti.

V with theeXtrem-ities of said pin to press said pin into said pin seat, and means for securing said spring against movement on said arm.

3. In a device of the class described, the combination of an arm adapted to be secured to a rotary shaft and provided with a pin seat, a contact roller, a pin for said roller and adapted to be seated in said pin seat, a

spring removablysecured to said arm and 7 adapted to co-act withthe extremitiesof said pin to force saidpin into said seat and maintain said pin in said seat, andmeans for securing said spring in place on said arm. a 4. In a device of the class described, the

combinationof-an arm adapted to .be-secured to a rotary shaft and provided with a pin seat, a contact roller,- a pin for said roller and mounted in said pin seat, and aspring provided at one end with means for maintaining said pin in said seat' and at the opposite end with means whereby said spring may be removed from the device and between its ends with. means; for securing" said spring to said arm. V 1" r In testimony whereof I have aflixedmy signature. V a 7 V orro J, HEINZMANN. V 

